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131.
132.
A large network of exceptionally well-engineered prehistoric canals has been discovered near Safford, Arizona. Within an area of roughly 450 km2, 12 distinct canal systems, comprised of 41 canals, have been identified originating in the bajada of the Pinaleño Mountains. Conveying water from runoff and springs, the longest canal is about 13?km, and the total length of all systems exceeds 125?km. While a few canals may date to ca. a.d. 1100, the vast majority date to between ca. a.d. 1250 and 1450 and appear to be constructed by migrants from northeastern Arizona. These features represent the second largest network of canal systems in the American Southwest, and, while smaller in size and total length than the canal systems of the Phoenix Basin, they exhibit engineering sophistication not found in those systems. These canals have expanded the knowledge of prehistoric water management engineering and agricultural intensification in the American Southwest. 相似文献
133.
Rosemary Ellison Jane Renfrew Don Brothwell Nigel Seeley 《Journal of archaeological science》1978,5(2):167-177
As a result of excavations at Ur by Woolley (1923–1934) food debris was recovered and is now reported on. Plant remains include chickpea, six-row barley, wheat, pea, dates, perforated crab apple rings and possible flat bread. Of special interest are the chickpeas which are among the earliest found in lowland Mesopotamia and the crab apple rings which have not been found before in ancient deposits in the Near East. Of the mammals, caprovids seem to have been most important as food offerings. The occurrence of tunny fish vertebrae was unexpected.The preliminary analysis of some inorganic residues is so far inconclusive although it is possible that one of the residues may originally have contained salt. 相似文献
134.